【摘要】 研究了Cr扩散阻挡层对柔性不锈钢衬底Cu(InxGa1-x)Se2(CIGS)太阳电池性能的影响.XRD和SEM分析表明,Cr阻挡层能够部分阻挡Fe等杂质从不锈钢衬底热扩散进入CIGS吸收层中,同时可以显著降低CIGS吸收层的粗糙度,提高薄膜结晶质量.从衬底扩散进入吸收层中的Fe元素以FeInSe2的形式存在,并形成FeCu等深能级缺陷,钝化了器件的性能.相同工艺条件下,在玻璃、不锈钢以及不锈钢/Cr阻挡层上所制备电池的(有效面积0·87cm2)转换效率分别为10·7%,7·95%和8·58%,不锈钢衬底电池效率的提高归因于Cr阻挡层的作用.更多还原

【Abstract】 The effects of a Cr diffusion barrier on the performance of flexible Cu（In_xGa_<sub> 1-x ）Se₂（CIGS） solar cells deposited on stainless steel （SS） substrate are investigated.The XRD and SEM results show that the Cr barrier layer can partly block the thermal diffusion of Fe impurities from SS substrate to a CIGS absorber layer and also remarkably reduce the surface roughness of the CIGS layers,and thus the crystalline quality of CIGS thin films is improved.Iron in the compound FeInSe₂ forms a deep level defect in the CIGS absorber layers and degrades the photovoltaic properties.Flexible solar cells （with an active area of 0.87cm²） deposited on Soda-Lime glass/Mo,SS/Mo and SS/Cr barrier/Mo,using the same deposition conditions,have conversion efficiencies of 10.7%,7.95%,and 8.58%,respectively.The enhancements of solar cells based on SS are due to the impacts of Cr barriers.更多还原